Abbott-Smith Manual Greek Lexicon
φθέγγομαι (G5350)
3 φθέγγομαι [in LXX for ענה , נבע hi., etc. ;] of men or animals, to utter a sound or voice: absol., Ac 4:18 ; seq. ἐν φωνῇ , II Pe 2:16 ; c. acc., ὑπέρογκα , ib. 18 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain